Timer.



No.- 888,195 PATENTED MAYlQ, 1908.

W. W. ROBINSON. TIMER.

APPLICATION FILED AUG. 24, 1907.

INVENTOH ATTOHNEX.

UNITED STATES PA'rENT ()FFICE.

WAT/PER W. ROBINSON, F VEST NEW YORK, NEW JERSEY, ASSIGNOR TO WIIHERBEEIGNITER COB'IPAYY, A (ICRPORATION OF NEW JERSEY.

TIMER.

Specification of Letters Patent.

Patented May 19,1908.

Application filed August at, 1907. Serial no. 389,973.

and State of New Jersey, have invented cer.

tain new and useful Improvements in Timers, of which the following is aspecification, reference being had therein to the accompanying drawing.

My invention relates especially to electrical contact breakers-forsparking circuits of automobiles, and the like, and has for its objectthe provision of a simple and effective interrupter wherein the defectsof the usual wipe-contact circuit interrupter are obviate-d.

To attain the desired end, my invention consists in the combination witha casing provided with one or more contact pieces, of a loose ring ofless diameter than the chamber Within the casing, and a roller carriedby a rotatable member adapted and arranged to move the ring in,aneccentric orbit, all of which will be hereinafter first fully described,and pointed out in the claims.

In the drawing, Figure 1 is a perspective View of a timer embodying myinvention. F1 2 is a lon itudmal axial sectional view thereof. Fig. i1is a i'ace view with the cover removed.

Similar numerals of reference, wherever they-occur, indicete'corresponding parts in all the figures.

1. is a casing made of'any pref rred mate rial. 2 is' a cover therefor.

3 is the chamber within the casing.

4 are binding posts, the construction of timer illustrated beingprovided with four,

. but it is obvious that my invention may be used with one or morecircuits, as required. Each post 4- is secured. to a cap 5 which in.tui'ii is held to e perforated insulating piece 6 by screws 7, thepiece tl'entcring a perforation 8 in the circumferential wall of theeas- .tending through the ing 1, 'whe reit gis held, as by it screw, 9.

10 1s a hollow conductingcontact-piece exlator 6, a. flange at t 2 outerextremity limiting the inward movement of the piece 10.

11 1s.- a conductingspring which forces the piece/I0 inward, thisconstruction being particularly shown. in Fig. 2 of the drawing.

-12 en arnior holding the cesing'iin it lined position oerforation inthe insu 13 is a sleeve projecting into the casing 1, adapted to besecured to a rotatable shaft by means of a set-screw, 1.4; the inner endof the sleeve beers a projection, 15 on which is fixed it ring 16carrying ears 1'? whereon is pivoted a yoke 18, the free end thereof isforced outward by a spring 19.

20 is a roller mounted inthe yoke 18.

21 is a metallic ring, preferably mede of brass, of less diameter thanthe chamber 3,

said ring being held between the wall of the chamber and the roller 20.

In operation, as the sleet e 13 revolves, the ring 21 moveseccentrically, coming in contact with each of the ieces 10 insuccession,

and as the ring is of ess diameter than the wall of the chamber whereinit moves, and also slips slightly, practically a new contact surface ispresented to the pieces 10 with each revolution of the sleeve,preventing pitting or wear of the rin increasing the efliciency of thetimer, and greatly augmenting its durability and life.

Having now fully described my invention, what I claim {LS new therein,and desire to secure bylictters Patent, is:

1. In a timer of the character herein specilied, the combination with ahollow casin contacts carried thereby, and arotatahe member locatedtherein, of a spring-actuated roller carried by said member, and a loosering having smooth inner and outer faces located. between the roller andthe wall of the hollow casing.

A timer in which is comprised a hollow casing; a. plurality of insulatebinding posts mounted on the periphery of the ass mg; movablecontact-pieces extending into the hollow casing from the binding-posts;a rotatable member extending into the hollow casing; a yoke carried bythe rotatable member; a roller jcurneled in said yoke, and a loose ringhaving smooth inner and outer faces, located between the roller and thewall of the hollow casing;

In testimonywiiereof I hereto afiix my signature in presence oi twowitnesses.

WALTER W. Rom-Neon.

llv'itnesses. l I

, A. B. ELLIOTT.

F. E. ROTH.

